Some example of data:
Group1:
building1 {energy: 20, area:10}
building2 {energy: 25, area:15}
building3 {energy: 50, area:30}
building4 {energy: 25, area:20}
Group2:
building5 {energy: 20, area:5}
building6 {energy: 30, area:25}
building7 {energy: 50, area:40}
building8 {energy: 25, area:10}
I want the chart to be able to get series by group and point out which building each point is.